Performance of hetero junction with intrinsic thin-layer solar cell depending upon contact resistivity of front electrode

Abstract. Low temperature curing of Ag paste for electrode formation in silicon hetero junction (SHJ) solar cells is important for providing better device characteristics. Ag paste is composed of solvent, various organic materials, and additives; hence its electrical and mechanical adhesion properties depend on the curing conditions. The adhesion of the Ag paste was determined by scratch test, whereas the specific contact resistance was measured using the transfer length method. Various Ag electrodes were formed at various curing temperatures within the temperature range of 160°C–240°C, at 20°C intervals. The curing time was also varied for another set of Ag electrodes. With 200°C temperature and for 20-min curing, the critical load of 20.06 N and specific contact resistance of 19.61  mΩ·cm2 were observed. Using the same conditions, the efficiency of the SHJ solar cell was found to be improved by 3.8%.

[1]  Jun-Ho Lee,et al.  Thermal decomposition of silver acetate in silver paste for solar cell metallization: An effective route to reduce contact resistance , 2013 .

[2]  Makoto Tanaka,et al.  Twenty-two percent efficiency HIT solar cell , 2009 .

[3]  F. Shi,et al.  Screen-Printable Silver Pastes with Nanosized Glass Frits for Silicon Solar Cells , 2013, Journal of Electronic Materials.

[4]  A. Perry,et al.  Scratch adhesion testing of hard coatings , 1983 .

[5]  Rapid Thermal Processing of High Efficiency N-Type Silicon Solar Cells with Al Back Junction , 2006, 2006 IEEE 4th World Conference on Photovoltaic Energy Conference.

[6]  Enhancement of electrical conductivity of thick silver electrode using a tailored amorphous alloy , 2012 .

[7]  Y. K. Chou,et al.  Interface characterizations of diamond-coated tools by scratch testing and simulations , 2011 .

[8]  Akhlesh Lakhtakia,et al.  Analysis of prismatic bioinspired texturing of the surface of a silicon solar cell for enhanced light-coupling efficiency , 2013 .

[9]  H. Lim,et al.  Low temperature-cured electrically conductive pastes for interconnection on electronic devices , 2012 .

[10]  S. M. Iftiquar,et al.  Analysis of optical absorption and quantum efficiency due to light trapping in a n–i–p type amorphous silicon solar cell with textured back reflector , 2014 .

[11]  Nian Chen,et al.  Metallization of crystalline silicon solar cells: A review , 2012, High Capacity Optical Networks and Emerging/Enabling Technologies.

[12]  S. M. Iftiquar,et al.  Diffused transmission and texture-induced defect with transparent conducting oxide front electrode of amorphous silicon solar cell , 2013 .

[13]  Sukhvir Singh,et al.  A novel method for the determination of the front contact resistance in large area screen printed silicon solar cells , 2000 .

[14]  C. Ballif,et al.  High-efficiency Silicon Heterojunction Solar Cells: A Review , 2012 .

[15]  P. Vinod.  Specific contact resistance measurements of the screen-printed Ag thick film contacts in the silicon solar cells by three-point probe methodology and TLM method , 2011 .

[16]  K. Hynes,et al.  Photovoltaic solar cells: An overview of state-of-the-art cell development and environmental issues , 2005 .

[17]  Jeong Chul Lee,et al.  Light management and efficient carrier generation with a highly transparent window layer for a multijunction amorphous silicon solar cell , 2013 .

[18]  Efficiency Improvement in Screen-printed Crystalline Silicon Solar Cell with Light Induced Plating , 2013 .

[19]  V. Dao,et al.  Processed optimization for excellent interface passivation quality of amorphous/crystalline silicon solar cells , 2013 .

[20]  Yoonsoo Han,et al.  Front-side Texturing of Crystalline Silicon Solar Cell by Micro-contact Printing , 2013 .

[21]  Lawrence L. Kazmerski,et al.  Solar Photovoltaics R&D at the Tipping Point: A 2005 Technology Overview , 2006 .

[22]  Application of power loss calculation to estimate the specific contact resistance of the screen-printed silver ohmic contacts of the large area silicon solar cells , 2007 .

[23]  T. Saga.  Advances in crystalline silicon solar cell technology for industrial mass production , 2010 .

[24]  Fabrice Petit,et al.  Characterization of mechanical properties of suspension plasma sprayed TiO2 coatings using scratch test , 2008 .

[25]  Optimizing of Diffusion Condition in Spin on Doping for c-Si Solar Cell , 2013 .